York International DFAA User's Information, Maintenance And Service Manual page 13

TABLE 6: Oil Burner Control Troubleshooting (Continued)
PROCEDURE
8. Listen for spark after burner turns
on (after a 2-second delay).
9. Check indicator light after flame is
established, but before oil primary
control locks out.
10. Check cad cell sighting for view of
flame.
a. Disconnect line voltage power
and open line switch.
b. Unplug cad cell and clean cad
cell face with soft cloth. Check
sighting for clear view of flame.
c. Reconnect line voltage power
and close line switch.
d. Start burner.
11. Check cad cell.
a. Disconnect line voltage power
and open line switch.
b. Remove existing cad cell and
replace with new cad cell.
c. Disconnect all wires from ther-
mostat terminals to be sure
there is no call for heat.
d. Reconnect line voltage power
and close line switch.
e. Expose new cad cell to bright
light, such as a flashlight.
12. Check cad cell bracket assembly.
a. Disconnect line voltage power
and open line switch.
b. Remove cad cell wires from
quick-connect connectors on
the R7184 and leave control
lead wires open.
c. Apply power to the device.
d. Place jumper across cad cell
terminals after burner motor
turns on.
a.
Unitary Products Group
STATUS
Spark ignitor could be defective. Check for line voltage at ignitor terminals. If line
Ignition is off.
voltage is present, replace R7184.
Ignition is on. Go to Step 9.
Ignition is on, but no
oil is being sprayed Wait for valve-on delay to complete (R7184B, P, and U). Check oil valve, oil valve
into the combustion wiring, pump and oil supply.
chamber.
Indicator light is on
until the control locks
Replace R7184.
out and starts flash-
ing during lockout.
Indicator light stays
Go to Step 10.
off.
Burner locks out. Go to Step 11
Burner keeps run-
System is okay.
ning.
Indicator light is on. ce control back on burner. Go to Step 6.
Indicator light is off. Go to Step 12.
Replace cad cell bracket assembly. Refer to TRADELINE® Catalog for bracket part
Indicator light is on.
numbers.
Indicator light is off. Replace R7184.
a
CORRECTIVE ACTIONS
107273-UUM-C-0306
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